DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK WHETHER MIL IS ILLUMINATED
CHECK WHETHER MIL TURNS OFF
CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT IN WIRE HARNESS)
CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)
CHECK THAT MIL IS ILLUMINATED
CHECK THAT ENGINE STARTS
CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)
SFI SYSTEM - MIL Circuit
DESCRIPTION
The MIL (Malfunction Indicator Lamp) is used to indicate the detection of vehicle malfunctions by the ECM. When the ignition switch is turned to ON, power is supplied to the MIL circuit and the ECM provides the circuit ground which illuminates the MIL.
The MIL operation can be checked visually. When the ignition switch is first turned to ON, the MIL should be illuminated and should then turn off when the engine is started. If the MIL remains illuminated or is not illuminated, conduct the following troubleshooting procedure using the GTS.
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.CHECK WHETHER MIL IS ILLUMINATED |
Perform troubleshooting in accordance with the table below.
Result| Result | Proceed to |
| MIL remains on | A |
| MIL does not illuminate | B |
| 2.CHECK WHETHER MIL TURNS OFF |
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Check if DTCs have been stored (). If DTCs are output, write them down.
Check that the MIL turns off.
| OK | |
| |
| REPAIR CIRCUITS INDICATED BY OUTPUT DTCS ()
|
|
| 3.CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT IN WIRE HARNESS) |
Disconnect the ECM connector.
Turn the ignition switch to ON.
Check that the MIL is not illuminated.
- OK:
- MIL is not illuminated.
| 4.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM) |
Disconnect the ECM connector.
Disconnect the combination meter assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
for LHD| Tester Connection | Condition | Specified Condition |
| E8-12 (CHK) or A38-24 (W) - Body ground | Always | 10 kΩ or higher |
for RHD| Tester Connection | Condition | Specified Condition |
| E8-12 (CHK) or A52-24 (W) - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| OK | |
| |
| REPLACE COMBINATION METER ASSEMBLY ()
|
|
| 5.CHECK THAT MIL IS ILLUMINATED |
Check if the MIL is illuminated when the ignition switch is turned to ON.
| 6.CHECK THAT ENGINE STARTS |
Turn the ignition switch to ON.
Start the engine.
Result| Result | Proceed to |
| Engine starts | A |
| Engine does not start* | B |
- *: The GTS cannot communicate with the ECM.
| | GO TO VC OUTPUT CIRCUIT ()
|
|
|
| 7.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM) |
Disconnect the ECM connector.
Disconnect the combination meter assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
for LHD| Tester Connection | Condition | Specified Condition |
| E8-12 (CHK) - A38-24 (W) | Always | Below 1 Ω |
for RHD| Tester Connection | Condition | Specified Condition |
| E8-12 (CHK) - A52-24 (W) | Always | Below 1 Ω |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| OK | |
| |
| REPLACE COMBINATION METER ASSEMBLY ()
|
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